500X tip over

[mtchristman]

I've had the 500X for a year or so. Been my big heli and has always been rock solid as long as I keep the belt siliconed.

The beastx was placed inside the frame and I decided to move it up top so I could see when it was done initializing. I didn't get one of the beastx settings correct and had a tip over on spool up. Cost me a set of new blades and everything else looked fine.

Now when I spool up the tail spins hard to the right with it tail in while still on the ground. Once I get it fully spooled up and off the ground it flies great. I just can't figure out why it spins so hard on spool up. I'm even setting the rudder to the oposite direction on spool up trying to keep it from going hard to the right. Any ideas?

[1080tommy]

That's seems like a tough one. I just had the same exact thing happen to my 500X only I tipped over landing. I replaced the boom and the main rotor drive pulley and my tail went the the right on the ground as well. I had the belt twisted the wrong way and my tail rotor was rotating the opposite of how it should have. The part that is weird with yours is that you get her up and she flies great. Hope you figure that thing out. Good luck!!!!

[EBrom]

Check for any fuzz or vibrations as you are increasing your head speed. Those will cause the BEASTX to you go to nuts. This could explain why it runs fine after you screw up completely and idle up.
There should be some built-in right rudder component in the set up to counter the clockwise spinning main blades. You might check your tail slider for centering on the tail shaft. See what it looks like when you're servo is centered.

[torpicaltrail]

Based on your symptoms, I agree with Ebrom that vibes should be your #1 suspect. The crash likely screwed something up that is causing resonance vibes at low RPM/head speed, clearing up (or actually diminishing would be a better word) at higher head speeds.

Things to check - bent feathering shaft, bent main shaft, tail rotor bearings, belt tension (not too tight), OWB. If you have the plastic tail case, it is very prone to crash damage where the tail rotor bearings are seated.

Finally, if you are running the plastic tail grips, I would strongly urge you to replace with aluminum upgrade ones even if they aren't or don't appear to be damaged as they are a known weak link in this otherwise mostly great bird.

Good luck,


Don

[tonys-heli]

ground the tailboom to the motor mount with a small piece of wire..static drives the fbl crazy

[mtchristman]

Forgot to mention I replaced the owb. Did a spool up with no blades after replacing the owb and every thing seemed fine. have the aluminum tail blade grips but still using the plastic tail case.

I flew it Tuesday evening and had to baby it in for a landing. Was having a bad case of static electricity. Relubed the belt but haven't had a chance to fly again. Maybe I will get lucky and that will cure my crazy tail on spool up. Usually I don't get lucky lol.

To be honest it's always had a bad vibration on spool up. But always cleared up once it got up to full speed. It never caused any problem before. I may need to dig a little deeper. I have extra feathering and main shafts. So I will replace those and see what happens. Will check the bearings over also. Tail centers fine and seems nice and smooth.

[tonys-heli]

Originally Posted by tonys-heli

ground the tailboom to the motor mount with a small piece of wire..static drives the fbl crazy

mine was giving full rudder on spool up, once in the air it was giving left rudder like it was out of trim..upon landing , it was giving full rudder again !..grounded boom and no more problems! and I don't lube my belt.. .02 cents

[mtchristman]

Originally Posted by tonys-heli

mine was giving full rudder on spool up, once in the air it was giving left rudder like it was out of trim..upon landing , it was giving full rudder again !..grounded boom and no more problems! and I don't lube my belt.. .02 cents

Yes I definitely need to do that. I got a new hakko soldering station and kinda like soldering now. So soldering a couple connectors on a wire isn't a big deal.